Ugh, that's terrible. Sorry you are feeling bad still. So, we're sure you didn't have corona virus, right? lol I have to ask since it's around and you had a cough. But in terms of a lingering cough after a respiratory illness, not uncommon. Once those airways get irritated, it can last for over 2 months after. Such a pain, I know. I guess too, you have ruled out gastric reflux, correct? Asthma? Those also can lead to a chronic cough. Acute bronchitis lasts 3 to 10 days and chronic bronchitis can last for weeks. Sorry to say. This talks about chronic bronchitis. Inflammation and irritation can last a good bit of time, making the bronchitis chronic or long term. https://medlineplus.gov/chronicbronchitis.html There are various treatments but lots of the same of which you've already been on. Antibiotics. Inhalers. And if you smoke, quit. You WILL heal. I had this and at about the 2 month point after, it get better. If it doesn't, get screened again for why.